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  • 1
    Electronic Resource
    Electronic Resource
    The late-glacial/holocene Bosmina (Eubosmina) fauna of Lake Constance (Untersee) (F.R.G.): traces of introgressive hybridization (1991)
    Springer
    Hydrobiologia 225 (1991), S. 81-85 
    Details
    ISSN: 1573-5117
    Keywords: Bosmina (Eubosmina) ; Lake Constance ; sediment analysis ; morphological variation ; introgressive hybridization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Subfossil Bosmina (Eubosmina) remains were analysed in a sediment core from the Untersee of Lake Constance which covered the Late-Glacial/Holocene period. During the Late-Glacial and the early Holocene the lake was inhabited only by Bosmina longispina Leydig. In the Late Holocene a second species, Bosmina coregoni f. kessleri Uljanin, appeared. In the uppermost sediment layers the morphological gap between the two taxa disappeared, apparently from introgressive hybridization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028387
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    On temporal variation in the rotifer Keratella cochlearis (Gosse): the question of “Lauterborn-cycles” (1983)
    Springer
    Hydrobiologia 101 (1983), S. 247-254 
    Details
    ISSN: 1573-5117
    Keywords: Keratella cochlearis ; morphological variation ; cyclomorphosis ; Lauterborn cycle ; taxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The existence of separated forms within the population of Keratella cochlearis (Gosse) from Lake Plußsee was demonstrated on the basis of a biometric analysis. The morphs cochlearis, hispida and tecta were definitely not connected by transitional forms. Micracantha and tecta were not links of a macracantha-micracantha-tecta-series. Hence, the general validity of Lauterborn-cycles is questioned. In this connection, the taxonomy of this species is also involved, because it is derived from the idea of phenotypic cycles in the sense of Lauterborn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00009882
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    Paper (German National Licenses)
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